Sidewalk-trap.



T. M. BRINTNALL;

SIDEWALK TRAP.

APPLICATION FILED DEC. 4, 1911.

1,176,337. I Patented Mar. 21,1916.

\ i i i z 8 sas new

THOMAS M. BRINTNALL, 0F OAKLAND, CALIFORNIA, ASSIGNOR 0F ONE-HALF TO W. D. IHAMMOND, 0]? LOS ANGELES, CALIFORNIA.

SIDEWALK-TRAP.

Application filed. December 4, 1911.

To all whom it may concern:

Be it known that I, THOMAS M. BRINT- NALL, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented new and useful Improvements in Sidewalk- Traps, of which the following is a specification.

This invention relates to sidewalk traps and has for its object to construct the trap with a surface of concrete, cement, or tile, or other product which may be similar to the material of which thesidewalk is constructed, and to reinforce the material forming the sidewalk trap in such manner that it will have the requisite strength and conform to and harmonize with the sidewalk and present its upper surface flush.

view of the reinforcing member. 'Fig. 6 is a plan view of another form. Fig. v7 is a cross section on line w m in Fig. 6.

1 designates a frame which extends around the trap andis formed'in each corner with projecting loops 2, which receive ears 3 which project from door frames 4. The frame of each door is formed of a Z- bar, as shown in cross section in Fig. 2, and the ears 3 are pivoted in the loops 2 by pins 5. The frame 1 is formed with an inwardly ofl'set portion 6 which is equal to approximately half the depth of the frame and extends from a point below the upper edge of theframe to a point substantially midway of the upper and lower edge thereof. This offset portion is formed in its upper face with a moisture receiving channel 6". Projecting inwardly from and formed integral with the offset portion 6, is a door supporting flange 6". The upper horizontal flanges of the Z bars of the door frames 4 rest upon the upper face of the frame and offset portion and cover or seal' the moisture receiving channel 6", said flanges lying flush with the upper edge of crete.

Patented Mar. 21, 1916.

Serial No. 663,967.

the frame. The lower horizontal flanges of the Z bars rest upon the door supporting flanges 6". Strain placed upon the doors is evenly distributed upon the frame 1 and parts thereof in view of the supporting flange 6" and the cooperation of the X bars therewith.

In order to insure that the inner edges of the doors shall be flush with each other, a ledge 7 is secured under the left hand door, as shown in Fig. 2, and projects under the edge of the right hand door, so that the latter will rest thereon and be flush with the left hand door.

The door frames 4; are filled with panels 8 of concrete or other material, and the concrete is reinforced by bars 9 which rest upon the frames 4 and are embedded in the con- Fig. 5 shows the construction of a bar 9 which consists of an I-bar of sheet metal, the web of which is punched to produce alternately projecting lugs 10 on each side of the bar, and more securely fasten the reinforcing bar in position.

In the form shown in Fig. 6, the frame 11 is circular and conical as shown, and the door 12 is formed with a conical circular frame which has a disk shaped panel 13 of concrete which may be reinforced by rods 14. A hand-hold 15 is provided for lifting it.

What I claim is:

1. A sidewalk trap comprising a stationary frame, an inwardly offset portion formed on the frame and having its upper edge located below the upper edge of the frame, said offset portion having a moisture receiving channel therein, an inwardly exedge thereof, and door frames hinged to the In testimony whereof I have hereunto set V shape in fcross seetion, the'upp'er flange of- 28-dafof November, 1911; the door rame bars en agim the stationary 5 frame and offset porfion a nd closing the V THOMAS BRINTNAL-L' moisture receiving channel andthe lower In Vpresen'ce,of flange of the bars resting upon the support-" G; F. HACKLEY, ing flange. W. D. HAMMOND Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washingtoml). C.

stationary frame and comprising bars 2 my hand at LosAngeles, Ca1if0rn i a,this'l0 it 

